Hello there, For the benefit of Windows 10 users who have installed and enabled glass support via Aero Glass (glass8.eu), is it possible to add a toggle (perhaps in about:config) to allow disabling the default blue theme (specific in Windows 10) and enable a theme that supports glass (like Windows 7) so the title bar can be rendered with glass? For example: Chrome users report that disabling the custom title bar, via chrome://flags/#windows10-custom-titlebar, enables glass support to function beautifully. In the case of Firefox, there are two methods I've found to accomplish the desired effect but both come with caveats..... The first is utilizing a userChrome.css script which does the job but creates overlay issues with the minimize, maximize and close buttons. The second involves editing the firefox .exe and removing the windows 10 ID entry. This displays all elements, including aeroglass, perfectly but breaks compatibility with sites that cross-check the agent ID in Firefox and OS (i.e Netflix). As long as a toggle can be used to load the Windows 7 theme (with glass support enabled, of course), or whichever method is deemed the best for this use case, then this would make the life of Windows 10 & Aero Glass users much easier. Assuming that accomplishing this isn't a monumental task (and could also be extended to Thunderbird), that would be awesome!